Which security device or software filter inspects incoming and outgoing network traffic against defined security rules to block unauthorized access?
Answer and explanation
Correct answer: C. Firewall
- Step 1: Firewalls establish a protective perimeter between trusted internal networks and untrusted external networks like the Internet. Step 2. They inspect packet headers, stateful connection states, and application payloads to drop malicious traffic. Answer: Firewall. Why not the others: Bridges connect two network segments; repeaters regenerate physical signals; modems modulate analog-digital signals.
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